Can the base xbox one still play a 4k uhd blu-ray disc(it doesn't have to give a 4k output,...

Hi,

Several reasons.

1. The 360 has a DVD drive. Full HD discs use Blu-ray disc tecnology. 4K Ultra HD use UHD Blu-ray discs. The 360 can not read Blu-ray discs.

2. The internal 360 hardware is simply not fast enough to decode 4K video content, and the graphics hardware can not output to 4K anyway.

No software in the world can update old hardware.

"Ultra HD" Blu-Rays will play in 4K. Standard Blu-Rays will play in 1080p.

The Xbox One S will only output to the highest resolution offered by the Blu-Ray disc it plays.

I suppose this design choice was in mind because 4K/UHD-TVs already process and upscale a lower resolution image to "cleanly" use all of the 3840x2160 pixels, so it's not putting unnecessary load on the Xbox One S CPU.

Hey there ricedemon,

That's an odd issue for sure, one that we've not seen with 4K UHD discs. Which Blu-ray title are you playing that you're seeing this issue? To clarify, are you sure that you're using the 4K UHD disc and not the Standard Blu-ray? Can you share a picture of
the disc as well? Does the issue happen with all 4k UHD discs you try.

Let us know!

It doesn't support 4K UHD playback.

If you are referring to "Mastered in 4K" discs those are just 1080p titles made from a 4K master.

New hardware is required to playback UHD Blu-Ray.

This is the exact same behaviour I find.

I have my Xbox One S set to UHD 4K resolution for my 4K TV and the games and UHD 4K Blu-rays work fine at that resolution but when I pop a DVD or standard Blu-ray disc in, all I get is a postage stamp sized video in the middle of the screen. I am assuming
that the fault lies with the player software and not the Xbox One S hardware.

Very disappointing as it means that I can't use the XBox One S to play all my disc based video content on my 4K TV

Can anyone from Microsoft shed any light as to a potential fix for this ?